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<H1><A NAME="4">4 Quick Start: Dynamic Image Generation</A></H1>
<P> The purpose of this chapter is to put dynamic image generation in
 perspective and illustrate how HTML tags is used to call image
 generating scripts. Even if You are familiar with PHP it is strongly
 recommended to quickly browse through this chapter to make sure all
 concepts are known.</P>
<P> If You fully understand and can explain the concept of MIME types,
 HTTP streams and why the &quot;Headers already sent error&quot; error is very
 common when generating dynamic images with PHP it is probably safe to
 skip this chapter. Otherwise it might be wise to read through this
 chapter once.</P>
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